DotNetBar for Windows Presentation Foundation WPF, now includes the world’s first WPF Docking control in Office 2007 style that supports auto-hide windows, document docking, diamond docking guides and much more. DotNetBar for WPF also includes the Office 2007 style Ribbon control which is fully compliant with Office 2007 Ribbon Design Guidelines. Fully functional trial version available.
http://www.devcomponents.com/dotnetbar-wpf/
http://www.devcomponents.com/dotnetbar-wpf/